
- •Contents
- •Preface
- •Acknowledgments
- •Table of cases
- •Table of statutes
- •Table of statutory instruments
- •Table of treaties
- •Table of EC legislation
- •1 Property law: the issues
- •1.1. Basic definition
- •1.2. Illustrative example
- •1.2.1. John
- •1.2.1.1. The unexcised body cell and the question of ownership
- •1.2.1.2. John’s interest in the excised body cell
- •1.2.1.3. Continuity of interests and John’s interest in the cell line
- •1.2.1.4. Enforceability of John’s interest in the cell line
- •1.2.2. Dr A and Dr B and the acquisition and transmission of property interests
- •1.2.3. The drugs company: constraints on the exercise of property rights
- •Notes and Questions 1.1
- •2 What we mean by ‘property’
- •2.1. Introduction
- •2.1.1. Property as a relationship and as a thing
- •2.1.2. Conceptualising ‘things’
- •2.1.3. Distinguishing property rights from other rights relating to things
- •2.1.4. Rights and other entitlements: Hohfeld’s rights analysis
- •2.1.4.1. Rights and duties, privileges and no-rights
- •2.1.4.2. Privileges and no-rights, and powers and liabilities
- •Abandonment
- •Effect of restrictions on alienation rights
- •2.1.4.3. Powers and liabilities, immunities and disabilities
- •2.1.5. Hohfeldian analysis of dynamic property relationships
- •2.1.5.1. Stage 1: Before the grant of the option
- •2.1.5.2. Stage 2: Grant of the option
- •2.1.5.3. Stage 3: Exercise of the option
- •2.1.6. Property rights, property interests and ownership
- •Notes and Questions 2.1
- •2.2. Private property, communal property, state property and no property
- •2.2.1. Introduction
- •2.2.2.1. No-property: ownerless things
- •2.2.2.2. Open access communal property
- •Distinction between open access and limited access communal property
- •Distinction between open access communal property and no property
- •Distinction between open access communal property and state property
- •Distinction between allocation and provision of resources
- •Regulation of communal property
- •2.2.2.3. Limited access communal property
- •Distinction between communal property and co-ownership
- •Particular use rights rather than general use rights
- •2.2.2.4. State property
- •2.2.2.5. Anticommons property
- •2.3. Economic analysis of property rights
- •2.3.1. What economic analysis seeks to achieve
- •Notes and Questions 2.2
- •2.3.2. Key concepts in the economic analysis of property rights
- •2.3.2.1. Externalities
- •2.3.2.2. Transaction costs
- •Imperfect information
- •Costs of collective action
- •Free-riders and holdouts
- •2.3.2.3. Efficiency
- •Value
- •Pareto efficiency
- •Kaldor-Hicks efficiency
- •2.4. Things as thing and things as wealth
- •2.4.1. Functions of things
- •2.4.2. The idea of a fund
- •2.4.3. Thing versus wealth
- •2.4.4. Related conceptions
- •2.4.4.1. Fungibles and non-fungibles
- •2.4.4.2. ‘Use value’ and ‘exchange value’
- •2.4.4.3. Property and personhood
- •Use value/exchange value
- •A functional distinction
- •Notes and Questions 2.3
- •3 Justifications for property rights
- •3.1. Introduction: general and specific justifications
- •3.2. Economic justification of property rights
- •3.2.1. Property and scarcity
- •Notes and Questions 3.1
- •3.2.2. Viability of single property systems
- •3.2.3. Criteria for measuring the success of a particular form of ownership
- •3.3. John Locke’s justification for private property
- •3.3.1. What Locke was attempting to establish
- •3.3.2. The political context
- •3.3.3. The problem of consent
- •3.3.4. Locke’s justification for original acquisition
- •3.3.5. The nature of Locke’s commons
- •3.3.6. Why mixing labour with a thing should give rise to entitlement
- •3.3.7. The sufficiency proviso
- •3.3.8. The spoilation proviso
- •3.3.9. The theological dimension to Locke’s theory
- •3.3.10. Present relevance of Locke’s theory
- •Notes and Questions 3.2
- •4 Allocating property rights
- •4.1. Introduction
- •4.2. The first occupancy rule
- •4.2.1. Intuitive ordering
- •4.2.2. Preservation of public order
- •4.2.3. Simplicity
- •4.2.4. Signalling
- •4.2.5. The bond between person and possessions
- •4.2.6. The libertarian justification
- •4.2.7. The communitarian objection
- •4.2.8. Economic efficiency
- •Notes and Questions 4.1
- •4.3. New things
- •Notes and Questions 4.2
- •4.4. Capture
- •Notes and Questions 4.3
- •5.2. Iron-holds-the-whale
- •5.3. Split ownership
- •4.5. Colonisation and property rights
- •4.5.1. Introduction
- •4.5.2. The Milirrpum decision and the doctrine of terra nullius
- •4.5.3. Mabo (No. 2)
- •4.5.3.1. Terra nullius
- •4.5.3.2. Property, sovereignty and the doctrine of radical title
- •4.5.3.3. Extinguishment
- •Express extinguishment
- •Implied extinguishment by inconsistent grant
- •Abandonment
- •Surrender but not alienation
- •Notes and Questions 4.4
- •4.5.4. Developments since Mabo (No. 2)
- •5 Personal and proprietary interests
- •5.1. Characteristics of proprietary interests
- •5.1.1. General enforceability
- •5.1.2. Identifiability of subject-matter
- •5.1.2.1. The basic principle
- •5.1.2.2. Fluctuating assets
- •5.1.3. Significance of alienability
- •5.1.3.1. Inalienability of communal property
- •5.1.3.2. Status rights
- •5.1.3.3. Appurtenant rights
- •5.1.4. Requirement for certainty
- •5.1.5. The numerus clausus of property interests
- •5.1.6. Vindication of property rights
- •5.1.7. Termination
- •5.1.7.1. Abandonment
- •5.1.7.2. Disclaimer
- •5.1.7.3. Forfeiture
- •5.1.8. Property rights and insolvency
- •5.2. Special features of communal property rights
- •5.2.1. Present scope of communal property
- •5.2.1.1. Rights of common
- •5.2.1.2. Customary rights
- •Notes and Questions 5.1
- •5.3. Aboriginal land rights
- •5.3.1. Nature of native title
- •5.3.2. Alienability
- •5.3.3. Abandonment
- •5.3.4. Variation
- •5.3.5. Extent of native title
- •5.3.6. Is native title proprietary?
- •5.3.6.1. Blackburn J’s view in Milirrpum
- •5.3.6.2. The view of the High Court in Mabo (No. 2)
- •5.3.6.3. The Canadian view
- •Notes and Questions 5.2
- •6 Ownership
- •6.1. The nature of ownership
- •6.1.1. The basis of ownership
- •6.1.1.1. Ownership and people
- •6.1.1.2. Ownership and things
- •6.1.2. An outline of the difficulties encountered in any consideration of ownership
- •6.1.2.1. The different meanings of ownership
- •6.1.2.2. Disagreements about ownership
- •6.1.2.3. Contradictions within ownership
- •6.1.2.4. The division of ownership
- •Between different types of owner
- •Between owners and non-owners
- •Notes and Questions 6.1
- •Notes and Questions 6.2
- •6.2. The contents of ownership
- •Notes and Questions 6.3
- •Notes and Questions 6.4
- •6.3. The roles played by ownership
- •6.3.1. As a legal term of art
- •6.3.1.1. Ownership’s role in land
- •6.3.1.2. Ownership’s role in chattels
- •6.3.1.3. Ownership’s role in legislation
- •6.3.2. As an amorphous notion
- •6.3.2.1. Ownership as an organising idea
- •6.3.2.2. Ownership as a contested concept
- •6.4. The limitations of ownership
- •6.4.1. Nuisance
- •6.4.1.1. A brief introduction to nuisance
- •Public nuisance
- •Private nuisance
- •6.4.1.2. The requirements of private nuisance
- •6.4.1.3. Private nuisance and private property
- •What is protected?
- •6.4.1.4. The allocation of entitlements
- •The traditional criteria
- •The role of the market
- •The role of public policy
- •6.4.1.5. The protection of entitlements
- •Property rules
- •Liability rules
- •Rules of inalienability
- •Notes and Questions 6.5
- •Notes and Questions 6.6
- •Notes and Questions 6.7
- •Notes and Questions 6.8
- •Notes and Questions 6.9
- •A. Property and liability rules
- •B. Inalienable entitlements
- •Notes and Questions 6.10
- •6.5. Restrictive covenants
- •Notes and Questions 6.11
- •Notes and Questions 6.12
- •7 Possession
- •7.1. The nature of possession
- •7.1.1. Introduction
- •7.1.2. Possession, ownership and proprietary interests
- •7.1.3. What is possession?
- •7.1.3.1. Factual control
- •The relevance of title
- •The nature of the thing possessed
- •The purpose for which the thing is used
- •Control through agents and control of contents
- •7.1.3.2. Intention required
- •Intention to exclude
- •Effect of ignorance
- •Notes and Questions 7.1
- •7.2. Possession of land
- •7.2.1. Leases and licences
- •7.2.1.1. Why the distinction matters
- •7.2.1.2. Distinguishing leases from licences
- •Notes and Questions 7.2
- •7.2.2. Possession and particular use rights
- •7.2.2.1. General and particular use rights
- •7.2.2.2. Compatibility of particular and general use rights
- •7.3. Possession of goods: bailment
- •7.3.1. Nature of bailment
- •7.3.2. Rights, duties and obligations of bailor and bailee
- •7.4. Protection of possession
- •7.4.1. Protection of property rights by protection of possession
- •7.4.2. Tort and the protection of property rights
- •7.4.2.1. The role of tort in the protection of property rights
- •7.4.2.2. Scope of the property torts
- •Conversion
- •What amounts to a conversion of goods?
- •Remedies
- •Trespass
- •What amounts to trespass
- •Remedies
- •7.4.3. Self-help remedies
- •7.4.3.1. Survival of self-help remedies
- •7.4.3.2. Restrictions and deterrents
- •7.4.4. Unlawful eviction and harassment
- •7.4.5. Trespassing and the criminal law
- •Notes and Questions 7.3
- •8 Fragmentation of ownership
- •8.1. Introduction
- •8.2. Present and future interests
- •8.2.1. Interests in possession, in reversion and in remainder
- •8.2.2. Absolute entitlements, contingent entitlements and mere expectancies
- •8.2.2.1. Absolute entitlements
- •8.2.2.2. Contingent interests and expectancies
- •8.2.2.3. Alternative contingencies
- •8.2.3. When interests vest
- •8.2.4. Alienation, management and control
- •8.2.5. Interests of contingent duration
- •8.2.5.1. Determinable interests
- •8.2.5.2. Interests subject to a condition subsequent
- •8.2.5.3. Distinguishing determinable and forfeitable interests
- •8.2.6. Requirement of certainty
- •8.2.7. Successive interests in land and the doctrine of tenures and estates
- •8.2.7.1. Tenures and estates
- •8.2.7.2. Estates in particular use rights
- •8.2.7.3. Leases
- •8.2.8. Restrictions on the power to create future interests
- •8.3. Legal and equitable interests
- •8.3.1. Origin of the legal/equitable distinction
- •8.3.1.1. Failed formality interests
- •8.3.1.2. Novel interests
- •8.3.2. Legal and equitable interests now
- •8.3.2.1. Interests in land
- •8.3.2.2. Interests in goods
- •8.3.3. The significance of the legal/equitable distinction
- •8.3.4. Three common fallacies
- •8.3.4.1. Equitable interests and beneficial interests
- •8.3.4.2. Over-identification of equitable interests with trusts
- •8.3.4.3. Absolute ownership does not include equitable beneficial ownership
- •Notes and Questions 8.1
- •8.4. Fragmentation of management, control and benefit
- •8.4.1. Corporate property holding
- •8.4.2. Managerial property holding
- •8.4.2.1. Trust
- •The trustee
- •The settlor
- •The beneficiaries
- •8.4.2.2. Administration of property on death
- •8.4.2.3. Bankruptcy and liquidation
- •Notes and Questions 8.2
- •8.5. Group ownership
- •8.6. General and particular use rights
- •Notes and Questions 8.3
- •9 Recognition of new property interests
- •9.1. Why are certain interests regarded as property?
- •9.1.1. The function of property
- •9.1.1.1. As a means of allocating scarce resources
- •9.1.1.2. As an incentive to promote their management
- •9.1.1.3. As a moral, philosophical or political statement
- •9.1.2. The danger of property
- •9.1.3. The requirements of property
- •9.2. The dynamic nature of property
- •9.2.1. The recognition and limits of the covenant as a proprietary interest
- •Notes and Questions 9.1
- •9.2.2. The recognition of a proprietary right to occupy the matrimonial home
- •Notes and Questions 9.2
- •9.3. The general reluctance to recognise new property rights
- •9.3.1. The facts of Victoria Park Racing v. Taylor
- •9.3.2. The views of the majority
- •9.3.3. The views of the minority
- •9.3.4. The significance of the case
- •Notes and Questions 9.3
- •9.4. A comparative confirmation and an economic critique
- •Notes and Questions 9.4
- •9.5. The future of property
- •9.5.1. The new property thesis
- •Notes and Questions 9.5
- •Notes and Questions 9.6
- •10 Title
- •10.1. What we mean by ‘title’
- •10.2. Acquiring title: derivative and original acquisition of title
- •10.2.1. Derivative acquisition: disposition or grant
- •10.2.2. Original acquisition
- •10.3. Relativity of title
- •10.4. Proving title
- •10.4.1. Role of registration
- •10.4.2. Possession as a root of title
- •10.4.3. Provenance
- •10.4.4. Extinguishing title by limitation of action rules
- •10.4.5. Relativity of title and the ius tertii
- •10.5. The nemo dat rule
- •10.5.1. Scope of the nemo dat rule
- •10.5.2. General principles applicable to all property
- •10.5.2.1. Registration and the nemo dat rule
- •10.5.2.2. Dispositions to volunteers
- •10.5.2.3. Powers of sale
- •10.5.3. The application of the nemo dat rule to goods
- •10.5.4. The application of the nemo dat rule to money
- •10.5.5. The application of the nemo dat rule to land
- •10.5.5.1. The general principle
- •10.5.5.2. After-acquired property
- •10.5.5.3. Interests by estoppel
- •10.6. Legal and equitable title
- •11 Acquiring title by possession
- •11.1. Introduction
- •11.2. The operation of adverse possession rules
- •11.2.1. Unregistered land
- •11.2.2. Registered land
- •11.2.3. What counts as ‘adverse’ possession
- •11.2.4. Effect on third party interests
- •11.3. Why established possession should defeat the paper owner
- •11.4. Adverse possession and registration
- •11.5. Good faith and the adverse possessor
- •1. Tension between principle and proof
- •Notes and Questions 11.1
- •A. Lockean entitlement
- •B. Utilitarianism
- •C. Property and personhood
- •B. Property theory and adverse possession
- •Notes and Questions 11.2
- •Notes and Questions 11.3
- •Stale claims in registered land
- •Stale claims under the 2002 Act
- •Distinguishing the ‘good’ squatter from the ‘bad’ squatter
- •Problems of proof
- •Effect of the 2002 Act changes on the incidence of adverse possession
- •The incompatibility argument
- •Notes and Questions 11.4
- •11.6. Goods
- •11.6.1. Taking and theft
- •11.6.2. Protection of title by tort
- •11.6.3. The Limitation Act 1980 and title to goods
- •11.6.4. Finders
- •Notes and Questions 11.5
- •12 Transfer and grant
- •12.1. Derivative acquisition
- •12.2. Formalities
- •12.2.1. Nature and content of formalities rules
- •12.2.2. Registration and electronic transactions
- •12.2.3. Validity and enforceability against third parties
- •12.2.4. Effect of compliance on passing of title
- •12.2.5. Transactions excepted from formalities rules
- •12.2.5.1. Equitable modification of legal rules
- •12.2.5.2. Implied rights
- •12.2.5.3. Rights acquired by possession or prescription
- •12.2.6. Deeds and prescribed forms
- •12.2.7. Why have formalities rules
- •12.2.7.1. The evidentiary function
- •12.2.7.2. The cautionary function
- •12.2.7.3. The channelling function
- •12.2.7.4. Other functions
- •Clarifying terms
- •Publicity
- •State functions
- •12.2.8. Disadvantages
- •12.2.8.1. Hard cases
- •12.2.8.2. Costs
- •Notes and Questions 12.1
- •Notes and Questions 12.2
- •12.3. Contractual rights to property interests
- •12.3.1. Estate contracts and the rule in Walsh v. Lonsdale
- •12.3.2. Application to property other than land
- •12.3.3. The failed formalities rule
- •12.3.3.1. The general rule
- •12.3.3.2. The failed formalities rule as it applies to land
- •12.3.3.3. Failed formalities rule as it applies to other property
- •Notes and Questions 12.3
- •Notes and Questions 12.4
- •12.3.4. Options to purchase, rights of pre-emption and rights of first refusal
- •Notes and Questions 12.5
- •Notes and Questions 12.6
- •12.4. Unascertained property
- •12.4.1. The problem of identification
- •12.4.2. Unascertained goods
- •12.4.3. Other unascertained property
- •Notes and Questions 12.7
- •13 Acquiring interests by other methods
- •13.1. Introduction
- •13.2. The difference between adverse possession and prescription
- •13.3. Why long use should give rise to entitlement
- •13.4. Rationale
- •13.4.1. Ascendancy of the presumed grant rationale
- •13.4.2. Effect of the ‘revolting fiction’
- •13.5. When long use gives rise to a prescriptive right
- •13.5.1. The problem of negative uses
- •13.5.2. Rights that can be granted but not acquired by prescription
- •13.6. User as of right and the problem of acquiescence
- •13.7. The future of prescription
- •Recommendation in favour of abolition
- •Minority view in favour of retention
- •Notes and Questions 13.1
- •14 Enforceability and priority of interests
- •14.1. Rationale of enforceability and priority rules
- •14.2. Enforceability and priority rules
- •14.2.1. The basic rules
- •14.2.2. Impact of registration
- •Notes and Questions 14.1
- •14.3. The doctrine of notice
- •14.3.1. Notice
- •14.3.2. Good faith
- •14.3.3. Effectiveness of the doctrine of notice as an enforceability rule
- •Notes and Questions 14.2
- •14.4. Overreaching
- •14.4.1. Nature and scope of overreaching
- •14.4.2. Operation of overreaching
- •14.4.3. Overreaching the interests of occupying beneficiaries
- •14.4.4. Transactions capable of overreaching beneficiaries’ interests
- •14.4.5. The two-trustees rule
- •Introductory
- •Overreaching
- •Safeguard for beneficiaries
- •Change of circumstances
- •Protecting occupation of property
- •Principal recommendation
- •Notes and Questions 14.3
- •15 Registration
- •15.1. What are registration systems for?
- •15.2. Characteristics of the English land registration system
- •15.2.1. Privacy
- •15.2.2. Comprehensiveness
- •15.2.3. Boundaries
- •15.2.4. Restricted class of registrable interests
- •15.2.4.1. Distinguishing ‘substantive’ registration and ‘protection’ on the register
- •15.2.4.2. Registration
- •15.2.4.3. ‘Protection’ by notice or restriction
- •15.2.4.4. The overriding interest class
- •15.2.5. The mirror, curtain and guarantee principles
- •THE ‘MIRROR PRINCIPLE’
- •THE ‘CURTAIN PRINCIPLE’
- •15.2.6. Consequences of non-registration
- •Notes and Questions 15.1
- •Compulsory use of electronic conveyancing
- •Do-it-yourself conveyancing
- •The objective of the power
- •The application of the power
- •Notes and Questions 15.2
- •15.3. Enforceability and priority of interests under the Land Registration Act 2002
- •15.3.1. Registrable interests
- •15.3.2. All other interests
- •15.3.2.1. Enforceability
- •15.3.2.2. Priority
- •15.4. Overriding interests
- •15.4.1. Justifications for overriding interests
- •15.4.2. Principles to be applied
- •15.4.3. Overriding interests under the 2002 Act
- •15.4.4. Easements and profits
- •15.4.5. Interests of persons in actual occupation: the 1925 Act
- •15.4.5.1. What rights are covered?
- •5.4.5.2. Actual occupation
- •Physical presence
- •Personal occupation
- •Non-residential premises
- •15.4.6. Interests of persons in actual occupation: the 2002 Act
- •15.4.6.1. Causal link between interest and occupation
- •15.4.6.2. Meaning of ‘actual occupation’
- •15.4.6.3. The ‘notice’ element
- •15.4.6.4. Can minors be in actual occupation?
- •15.4.6.5. Occupation of part
- •15.4.7. Complexity
- •Notes and Questions 15.3
- •15.5. Indemnity
- •15.5.1. Function of indemnity
- •15.5.2. Shortfall in the provision of indemnity
- •15.5.3. Cost
- •17 Leases and bailment
- •17.1. Introduction
- •17.2. Leases and bailments compared
- •17.2.1. Consensuality
- •17.2.2. Contract
- •17.2.3. Enforcement
- •17.2.4. Duration and purpose
- •17.2.5. Beneficial use
- •17.2.6. Proprietary status
- •17.2.7. Inherent obligations of the possessor
- •17.3. Leases
- •17.3.1. Nature of the lease
- •17.3.1.1. Duration: the four basic categories
- •The legal position
- •Length of fixed-term leases in practice
- •Commonhold as an alternative to the long residential lease
- •Commercial premises
- •Assignment and premature termination of fixed-term lease
- •17.3.1.3. Periodic tenancies
- •Nature
- •Contractual fetters on notice to quit
- •17.3.1.4. Tenancy at will
- •Tenancy at sufferance
- •Notes and Questions 17.1
- •17.3.1.5. Certainty of duration
- •Notes and Questions 17.2
- •Passage 2
- •Passage 3
- •Passage 4
- •Notes and Questions 17.3
- •17.3.1.7. The tolerated trespasser status
- •Notes and Questions 17.4
- •Notes and Questions 17.5
- •17.3.2. Alienability
- •17.3.2.1. Inherent alienability
- •Alienability of tenant’s interest
- •Subleases and other derivative interests granted by the tenant
- •Effect of termination of lease on derivative interests
- •Alienability of landlord’s interest
- •Concurrent leases and other derivative interests granted by the landlord
- •17.3.2.2. Restrictions on alienability
- •17.3.2.3. Statutory control of contractual restrictions
- •Notes and Questions 17.6
- •17.3.3. Effect of alienation on enforceability
- •17.3.3.1. Introduction: the basic principle
- •Automatic transmission of benefit and burden of proprietary terms: the privity of estate principle
- •Post-assignment liability: the privity of contract principle
- •17.3.3.3. Derivative interest holders
- •17.4. Bailment
- •17.4.1. Essential features of bailment
- •17.4.2. Categories of bailment
- •17.4.3. Characteristics of bailment
- •17.4.4. Liabilities of the bailee
- •Notes and Questions 17.7
- •17.4.5. Is bailment proprietary?
- •17.4.5.1. Possession and exclusivity
- •17.4.5.2. Alienability
- •17.4.5.3. Enforceability against third parties
- •17.4.5.4. Other proprietary indicia
- •18 Security interests
- •18.1. The nature and function of security
- •18.1.1. Nature of security
- •18.1.1.1. Terminology problems
- •18.1.1.2. Legal and equitable rights to redeem
- •18.1.1.3. Creation, attachment and perfection of security
- •18.1.2. Function
- •18.1.2.1. Right of first recourse
- •18.1.2.2. Attachment to the asset
- •18.1.2.4. The hostage function
- •18.1.2.5. Signalling, monitoring and control
- •18.1.3. Efficiency
- •18.1.4. Use of security
- •18.2. Forms of security
- •18.2.1. Property transfer securities: the mortgage
- •18.2.2. Possessory securities: pledge or pawn
- •18.2.3. Hypothecations: the charge
- •18.2.4. Liens
- •18.2.5. Property retention securities
- •18.2.6. Charge by way of legal mortgage
- •Notes and Questions 18.1
- •18.3. Control over the terms of the relationship
- •18.3.1. Equitable supervisory jurisdiction
- •18.3.2. The Kreglinger principles
- •18.3.3. Statutory intervention
- •Notes and Questions 18.2
- •18.4. Enforcement of security
- •18.4.1. Remedies
- •18.4.2. Possession
- •18.4.3. Sale
- •18.4.3.1. When the power arises
- •18.4.3.2. When the power becomes exercisable
- •18.4.4. Duties on enforcement
- •General principles
- •The handling of arrears: initial action taken by lenders
- •Alleviating arrears problems
- •The levying of charges on accounts in arrear
- •Methods of obtaining possession
- •Proceeds of sale
- •Indemnity insurance
- •Loss recovery procedures
- •Notes and Questions 18.3
- •16 Co-ownership
- •16.1. Introduction
- •16.2.1. Basic concepts
- •OWNERSHIP IN COMMON
- •JOINT OWNERSHIP
- •CONCURRENT INTERESTS IN FINANCIAL ASSETS
- •CONCURRENT INTERESTS IN LAND
- •Notes and Questions 16.1
- •Unity of possession
- •Unity of interest
- •Unity of title
- •Unity of time
- •16.2.2. A comparison of joint tenancies and tenancies in common
- •16.2.2.1. Four unities versus one
- •Notes and Questions 16.2
- •16.2.2.2. The right of survivorship (and how to avoid it)
- •Severance at common law
- •16.2.2.3. Acting upon one’s share
- •16.2.2.4. Mutual agreement
- •16.2.2.5. Mutual conduct
- •16.2.2.6. Statutory severance
- •Notes and Questions 16.3
- •16.2.3. Use of co-owned property
- •16.2.3.1. Land
- •12 THE RIGHT TO OCCUPY
- •13 EXCLUSION AND RESTRICTION OF RIGHT TO OCCUPY
- •Notes and Questions 16.4
- •16.2.3.2. Chattels
- •Notes and Questions 16.5
- •16.2.4. Sale and other dispositions of co-owned property
- •16.2.4.1. Land
- •Notes and Questions 16.6
- •16.2.4.2. Chattels
- •16.3. Other forms of co-ownership
- •16.3.1. Commonhold
- •16.3.2. Unincorporated associations
- •Notes and Questions 16.7
- •16.3.3. Extending the limits of co-ownership: public trusts
- •Bibliography
- •Index

What we mean by ‘property’ 45
hand, if property rights are well defined, enforced, and transferable, owners can trade their rights with others, making all parties better off.
The potential for gains from trade is revealed by many comparative studies that show economies with greater economic freedom – secure and tradable property rights defended by the rule of law – outperform other economies. For example, in economies with higher levels of economic freedom, per capita gross domestic product grew approximately 2.5 per cent, as compared to a 1.5 per cent decline in economies with less economic freedom between 1980 and 1994 . . . Keefer and Knack . . . report similarly that the absence of a secure rule of law diminishes rates of economic growth. Norton . . . not only finds that growth rates are higher in countries with more secure property rights, but that environmental quality is better. As Norton . . . puts it, ‘the specification of strong aggregate property rights appears to have an important place in improving human well-being’.
Notes and Questions 2.2
Only private property satisfies the criterion of transferability given in Postulate 4: communal property rights and state property cannot be transferred, but they can be as secure and well defined as private property rights. Does this mean that the benefits mentioned in the final paragraph of the extract can be gained only by private property? Is this what the authors mean by Postulate 4? If so, is Postulate 4 normative (i.e. telling us what sort of property regime ought to be adopted) or positive (i.e. analysing the effect of adopting a particular type of property regime)?
2.3.2. Key concepts in the economic analysis of property rights
The basic economic analysis of the emergence of property rights and the allocation of resources utilises three key concepts – externalities, transaction costs and efficiency.
2.3.2.1.Externalities
When I decide to use a resource of mine in a particular way, some of the effects of that decision will almost invariably fall on others rather than on me. If I do not take those effects into account when deciding whether to adopt that use of that resource, we would say that those effects are external to my decision. Effects (good or bad) that are external to a decision are called externalities. So, for example, the building of the Canary Wharf Tower had the effect of interfering with television reception for the residents of the Isle of Dogs (see Hunter v. Canary Wharf [1997] AC 655, discussed in Chapter 6). That effect was an externality as far as the builders of the tower were concerned: they did not take it into account because (as they then thought) they did not need to do so because (as they then thought, and the House of Lords subsequently held) they had no liability in law to refrain from interfering with television signals. Externalities can be good as well as bad. If I own a field and decide to graze sheep on it, it may improve the view of

46Property Law
neighbour X (who likes sheep and places a higher value on his land because he can watch them), ruin the garden of neighbour Y (because the sheep stray onto her land through gaps in the fence) and disturb the sleep of neighbour Z (whose bedroom is close to the shed where the sheep are herded at night and in the winter). Each of those effects will be externalities of my decision if I do not take them into account when making my decision.
The problem about externalities, as far as economics is concerned, is that they tend to lead to misuse of resources, because the full costs and benefits of the use are not taken into account. The use of the resource may therefore be inefficient, in the sense that a different use or use in a different way might yield a higher aggregate value (i.e. the aggregate benefit to all minus the aggregate costs of all would be higher).
The concept of efficiency in this context requires closer consideration. First, however, it is necessary to consider why it is that the ignoring of externalities tends to lead to misuse of resources.
Suppose that grazing sheep on my field gives an annual benefit of £500 to X (the neighbour who likes sheep), but imposes annual costs of £1,000 each on Y (whose garden is ruined by strays) and Z (whose sleep is disturbed by the noise from the shed). By fencing the field and moving and soundproofing the shed I could eliminate that cost to Y and Z without removing the benefit from X. If the annual costs to me of doing so are £1,500 (or anything less than £2,000) then it would be efficient to do so, because it will increase the aggregate of the value (benefit minus cost) for the four of us. Economists, however, would not expect me to choose this value-maximising alternative (i.e. carry out the works) because it would make me personally worse off, despite the net gain it would produce in the aggregate.
A change in the example demonstrates how externalities can lead to an inefficient failure to develop resources as well. Suppose my field is covered in grass which I mow regularly but otherwise do not use, and that this use imposes no costs or benefits on X (the neighbour who likes sheep). If I was to graze sheep on the field it would cost me an extra £100 a year (it would cost me that much more to use sheep to keep the grass cut than to use the mower), but it would confer benefits of £500 a year on X. The value-maximisation solution would be to change from mower to sheep, but again I would not be expected to adopt it because the gain is an externality as far as I am concerned.
Note that, in both examples the existence of externalities does not necessarily lead to inefficient use: it would be easy to change the figures so that there would be no net aggregate gain if I carried out the work in the first example or changed from mower to sheep in the second. The problem is that, because all the costs and benefits are not borne by the same person, no one will even make the calculation as to net gain.
Why, though, is the situation in which use is inefficient not self-adjusting? Specifically, why don’t those who are bearing the externalities offer to pay me an